Measuring the cosmic X-ray background accurately

Article Article scientifique Article Measuring the cosmic X-ray background accurately eng 2023-07-06 2023-07-06 author Li Hancheng 913895 Département d'astronomie (ASTRO) author Walter Roland 23812 Département d'astronomie (ASTRO) author Produit Nicolas 0000-0001-7138-7677 22959 Département d'astronomie (ASTRO) author Hubert Fiona 980156 141-170 10.1007/s10686-023-09896-7 0922-6435 https://link.springer.com/10.1007/s10686-023-09896-7 Synthesis models of the diffuse Cosmic X-ray Background (CXB) suggest that it can be resolved into discrete sources, primarily Active Galactic Nuclei (AGNs). Measuring the CXB accurately offers a unique probe to study the AGN population in the nearby Universe. Current hard X-ray instruments suffer from the time-dependent background and cross-calibration issues. As a result, their measurements of the CXB normalization have an uncertainty of the order of ∼15%. In this paper, we present the concept and simulated performances of a CXB detector, which could be operated on different platforms. With a 16-Unit CubeSat mission running for more than two years in space, such a detector could measure the CXB normalization with ∼1% uncertainty. Instrumentation Detectors - X-rays Diffuse background Dewey 520 26 Département d'astronomie 12 false Experimental astronomy 56 1 841641e4-c917-44a3-913d-1611ac3a5280 Article (Published version) Public Article_scientifique_from_unpaywall.pdf 2258001 application/pdf CC BY-4.0 79c1a00ef806f8609989c68f5a20f3b97e1764b27f27a664c7e8f82f59072410 openAccess Faculté des sciences / Département d'astronomie

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Measuring the cosmic X-ray background accurately	Experimental astronomy			2023	48	42

Archive ouverte UNIGE

Hubert, Fiona